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Laytonville quarry, Laytonville, Mendocino Co., California, USA

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A road metal quarry located in sec. 6, T20N, R14W (MD), about 5 miles S of Laytonville

Mineralization is in blueshist metasediments of the Franciscan Formation.



References:
Agrell, S.O. (1964), Deerite, howieite, and zussmanite, three new minerals from the Franciscan of the Laytonville district, Mendocino County, California (title only), American Mineralogist: 49: 1507.

Agrell, S.O., M.G. Brown & McKie (1965), Deerite, howieite and zussmanite, three new minerals from the Franciscan of the Laytonville district, Mendocino County, California: American Mineralogist: 50: 278.

Chesterman, C.W. (1966b), Mineralogy of the Laytonville quarry, Mendocino County, California, in: Geology of Northern California: California Division Mines & Geol. Bulletin 190: 503, 506.

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 167, 220, 394, 493.

Rice, S.J. (1966) A new mineral locality. California Division of Mines and Geology Mineral Information Service: 19: 7.

Onucki, H. and Ernst, W.G. (1969) Coexisting sodic amphiboles and sodic pyroxenes from blueschist facies metamorphic rocks. Mineralogical Association of America Special Paper 2: 242, 245.

Pemberton, H. Earl (1983), Minerals of California: 72, 212, 221, 390-391, 392, 395, 403, 426, 432, 487, 492, 496.





 Map Reference: 39°55'0"N , 123°27'3"W

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Group 2 - Sulphides and Sulfosalts
  		• Pyrite2.EB.05a
    FeS
     
    2
    Group 4 - Oxides and Hydroxides
  		• Quartz4.DA.05
    SiO
     
    2
    Group 5 - Nitrates and Carbonates
  		• Kutnohorite5.AB.10
    Ca(Mn,Mg,Fe)(CO
     
    3
    		)
     
    2
  		• Siderite
    var: Manganoan Siderite    		5.AB.05
    (Fe,Mn)CO
     
    3
    Group 9 - Silicates
  		• Aegirine9.DA.25
    NaFe
    3+
     
    		[Si
     
    2
    		O
     
    6
    		]
  		• Albite9.FA.35
    Na[AlSi
     
    3
    		O
     
    8
    		]
  		• Clinozoisite9.BG.05
    {Ca
     
    2
    		}{Al
     
    3
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
  		• Deerite (TL)9.DH.60
    (Fe,Mn)
     
    6
    		(Fe,Al)
     
    3
    		Si
     
    6
    		O
     
    20
    		(OH)
     
    5
  		• Glaucophane9.DE.25
    [ ][Na
     
    2
    		][Mg
     
    3
    		Al
     
    2
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
  		• Grunerite9.DE.05
    [ ][Fe
    2+
    2
    		][Fe
    2+
    5
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
  		• Howieite (TL)9.DH.65
    Na(Fe,Mn)
     
    10
    		(Fe,Al)
     
    2
    		Si
     
    12
    		O
     
    31
    		(OH)
     
    13
  		• Jadeite9.DA.25
    Na(Al,Fe
    3+
     
    		)[Si
     
    2
    		O
     
    6
    		]
  		• Lawsonite9.BE.05
    CaAl
     
    2
    		[(OH)
     
    2
    		|Si
     
    2
    		O
     
    7
    		] · H
     
    2
    		O
  		• Magnesioriebeckite9.DE.25
    [ ][Na
     
    2
    		][Mg
     
    3
    		Fe
    3+
    2
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
  		• Pumpellyite-(Mg)9.BG.20
    Ca
     
    2
    		MgAl
     
    2
    		[(OH)
     
    2
    		|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		] · H
     
    2
    		O
  		• Riebeckite9.DE.25
    [ ][Na
     
    2
    		][Fe
    2+
    3
    		Fe
    3+
    2
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
  		• Spessartine9.AD.25
    Mn
    2+
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
  		• Stilpnomelane9.EG.40
    (K,Ca,Na)(Fe
    2+
     
    		,Mg,Al,Fe
    3+
     
    		)
     
    8
    		(Si,Al)
     
    12
    		(O,OH)
     
    36
    		 · nH
     
    2
    		O
      var: Ferristilpnomelane9.EG.40
    K(Fe
    3+
     
    		,Mg,Fe
    2+
     
    		)
     
    8
    		(Si,Al)
     
    12
    		(O,OH)
     
    27
  		• Zussmanite (TL)9.EG.35
    K(Fe,Mg,Mn)
     
    13
    		(Si,Al)
     
    18
    		O
     
    42
    		(OH)
     
    14
    Unclassified Minerals
  		• 'Chlorite Group'-
  		• Crossite-
  		• Phengite-


    23 entries listed. 20 valid minerals.

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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Jobs in California, USA Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 26th Nov 2009 10:22:41